You know what is kind of funny? We only rarely saw them fight togehter in the show, and never (I think) explicitly these two. It's mostly something we asume - their deep understanding of each other showing in something they have in common and that is indeed a central part in both of them, their fighting skills. But it is so fitting to picture them like that, isn't it? So much so that it instantly came to my mind when I read the prompt at Fag Ends that originally belonged to the week's theme 'ice-skating' :)